/**
 * This function is called when a user clicks on "Übersicht".
 * It fetches all parameter from the form and forwards to the MainController to load the bookings.
 */
function showBookings() {
	var request = new Request.HTML({
		url: "/BookingOverview/index",
		update: $('bookingsBox') })
		.post({	'do': 'showBookings'});
}